- A
AWS VPN CloudHub to interconnect all VPCs.
Why wrong: VPN CloudHub is designed for connecting multiple customer gateways, not VPCs.
- B
AWS Direct Connect gateway with virtual interfaces to each VPC.
Why wrong: Direct Connect gateway is for connecting Direct Connect connections to VPCs, not for VPC-to-VPC connectivity.
- C
VPC peering between each spoke VPC and the hub VPC.
Why wrong: VPC peering creates a point-to-point connection and does not scale easily as the number of VPCs grows.
- D
AWS Transit Gateway with inter-Region peering attachments.
Transit Gateway provides a scalable hub-and-spoke architecture and supports inter-Region peering.
Question 768 of 1,705
Multi-Region Hub-and-Spoke with AWS Transit Gateway Inter-Region Peering
This ANS-C01 practice question tests your understanding of network implementation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A global company wants to connect multiple VPCs across different AWS Regions using a hub-and-spoke model. The hub VPC contains shared services such as Active Directory and DNS. Which AWS service provides the most scalable and maintainable solution for this architecture?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Transit Gateway with inter-Region peering attachments.
AWS Transit Gateway with inter-Region peering attachments is the most scalable and maintainable solution because it provides a central hub to connect multiple VPCs across different AWS Regions using a fully managed service. Inter-Region peering attachments allow transitive routing between all attached VPCs without requiring full mesh peering, and they support route propagation and centralized management of shared services like Active Directory and DNS. This architecture scales linearly as new VPCs or Regions are added, unlike VPC peering which requires individual non-transitive connections.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS VPN CloudHub to interconnect all VPCs.
Why it's wrong here
VPN CloudHub is designed for connecting multiple customer gateways, not VPCs.
- ✗
AWS Direct Connect gateway with virtual interfaces to each VPC.
Why it's wrong here
Direct Connect gateway is for connecting Direct Connect connections to VPCs, not for VPC-to-VPC connectivity.
- ✗
VPC peering between each spoke VPC and the hub VPC.
Why it's wrong here
VPC peering creates a point-to-point connection and does not scale easily as the number of VPCs grows.
- ✓
AWS Transit Gateway with inter-Region peering attachments.
Why this is correct
Transit Gateway provides a scalable hub-and-spoke architecture and supports inter-Region peering.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose VPC peering (Option C) because it is a familiar and simple solution, but they overlook the non-transitive nature of VPC peering, which prevents the hub from routing traffic between spoke VPCs and requires a full mesh of peering connections for transitive communication.
Detailed technical explanation
How to think about this question
AWS Transit Gateway uses a dynamic routing protocol (BGP) for inter-Region peering attachments, allowing routes to be automatically exchanged between Regions via the AWS global network backbone, which provides lower latency and higher bandwidth than internet-based VPNs. The hub VPC can be attached to the Transit Gateway and share its Active Directory and DNS services through route propagation and security group rules, while spoke VPCs can reach the hub without needing individual peering connections. A subtle behavior is that inter-Region peering attachments do not support multicast or anycast routing, and you must ensure that the Transit Gateway route tables in each Region are configured to prevent routing loops or asymmetric traffic flows.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Transit Gateway with inter-Region peering attachments. — AWS Transit Gateway with inter-Region peering attachments is the most scalable and maintainable solution because it provides a central hub to connect multiple VPCs across different AWS Regions using a fully managed service. Inter-Region peering attachments allow transitive routing between all attached VPCs without requiring full mesh peering, and they support route propagation and centralized management of shared services like Active Directory and DNS. This architecture scales linearly as new VPCs or Regions are added, unlike VPC peering which requires individual non-transitive connections.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Same concept, more angles
1 more ways this is tested on ANS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company needs to securely connect multiple VPCs across different AWS Regions using AWS backbone network infrastructure without traversing the public internet. The solution must be managed centrally and support transitive routing between VPCs. Which service should the company use?
easy- A.VPC peering connections in a full mesh.
- B.AWS PrivateLink and VPC Endpoints.
- ✓ C.AWS Transit Gateway with inter-region peering.
- D.AWS ClassicLink.
Why C: AWS Transit Gateway with inter-region peering allows you to connect VPCs across different AWS Regions using the AWS global backbone, avoiding the public internet. It provides a central hub for managing connectivity and supports transitive routing between all attached VPCs, which is not possible with VPC peering alone. This makes it the correct choice for a centrally managed, transitive, cross-region solution.
Keep practising
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Last reviewed: Jul 4, 2026
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ANS-C01 exam.
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